<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <input type="text" v-model="name"> <br>
        
        {{name}}
        
    </div>
</body>

<!-- 要使用Vue,一定要引入vue.js -->
<script src="js/vue.js"></script>
<script>
    new Vue({
        el: "#app",
        data: {
            name: "666"
        }
    })
</script>
</html>